EPA Air · by county
Air-emissions sources in Johnson County, Wyoming
- 41Facilities
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Every stationary source in Johnson County, Wyoming that holds a Clean Air Act permit or is otherwise tracked by an air agency — planned, under construction, operating, seasonal or temporarily closed. Sources EPA records as permanently closed are not listed.
Every source’s record in Johnson County
Each of the 41 operating major, synthetic minor and minor sources in Johnson County, Wyoming has a record page: every source in Johnson County, A to Z.
By emissions classification in Johnson County
A source’s classification is the size band its potential emissions put it in: a major source is large enough to need a Title V operating permit, a synthetic minor has accepted limits to stay below that line, and a minor source sits below it outright.
- Minor source 39
Inspections in Johnson County, by year
A compliance evaluation is the on-site or file review a state, local or federal air agency records against a permitted source.
Stack tests in Johnson County, by year
A stack test measures what a source actually emits, at the stack, against the limit in its permit.
- 2026 stack tests 33
- 2025 stack tests 39
- 2024 stack tests 42
- 2023 stack tests 10
- 2022 stack tests 7
- 2021 stack tests 10
- 2020 stack tests 14
- 2019 stack tests 16
- 2018 stack tests 18
- 2017 stack tests 26
Inspections in Johnson County, year by year · Stack tests in Johnson County, year by year
Other counties in Wyoming
Every county in the state with at least three sources on file.
- Albany County 13
- Big Horn County 15
- Campbell County 93
- Carbon County 25
- Converse County 28
- Crook County 11
- Fremont County 20
- Goshen County 6
- Hot Springs County 8
- Laramie County 42
- Lincoln County 23
- Natrona County 54
- Niobrara County 27
- Park County 25
- Platte County 15
- Sheridan County 35
- Sublette County 34
- Sweetwater County 106
- Teton County 4
Facilities
County as filed on the facility record. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register for Johnson county, WY. It lists 41 facilities in Johnson county and 2 major sources.